/Engine/Source/Runtime/Core/Public/Unix/UnixPlatformProcess.h
static bool ExecProcess ( const TCHAR * URL, const TCHAR * Params, int32 * OutReturnCode, [FString](API\Runtime\Core\Containers\FString) * OutStdOut, [FString](API\Runtime\Core\Containers\FString) * OutStdErr, const TCHAR * OptionalWorkingDirectory, bool bShouldEndWithParentProcess )